SMDV RFN-4s Slim Wireless Remote Shutter Cable Release, Transmitter, and Receiver Kit for Nikon Camera for Nikon D800, D800e, D4, D3, D2, D1, D300, D300s, and D200 (Replaces Nikon Cable MC-30) 2.4GHz Frequency with 16 Selectable Channels Slim, Unobtrusive Design and Ergonomic Wired/Wireless Remote Control Receiver is Powered by Camera's Battery & Transmitter Uses a Single AAA 1.5v Battery Circuit Designed to Operate in Extreme Temperatures (-20 to +50 C / -4 to +122 F) Includes a 24 month manufacturer warranty